When my wife first cranks her car after sitting 3 or 4 hours she has good pedal on her brakes. Then the pedal goes hard for a minute or two then the pedal goes back to good brake. If only sitting for a short period of time she has good soft pedal. I have not checked for vaccuum leaks with any type of gauge. Any ideas out there.

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Joseph Blackwell
1985 300SD
1990 300 2.5 Turbo